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// Portions Copyright [2018-2019] [Payara Foundation and/or its affiliates]

package com.sun.enterprise.server.logging;

import java.util.Timer;
import java.util.concurrent.ScheduledFuture;

public class LogRotationTimer {

    private LogRotationTimerTask rotationTimerTask;
    private ScheduledFuture<?> logRotationFuture;

    private static LogRotationTimer instance = new LogRotationTimer();
    private Timer rotationTimer;

    private LogRotationTimer() {
        rotationTimer = new Timer("log-rotation-timer");
    }

    public static LogRotationTimer getInstance() {
        return instance;
    }

    public void startTimer(LogRotationTimerTask timerTask) {
        rotationTimerTask = timerTask;
        rotationTimer.schedule(rotationTimerTask, timerTask.getRotationTimerValue());
    }

    public void stopTimer() {
         rotationTimer.cancel();
    }

    public void restartTimer() {
        // We will restart the timer only if the timerTask is set which
        // means user has set a value for LogRotation based on Time
        if (rotationTimerTask != null) {
            rotationTimerTask.cancel();
            rotationTimerTask = new LogRotationTimerTask(
                // This is wierd, We need to have a fresh TimerTask object
                // to reschedule the work.
                rotationTimerTask.task,
                rotationTimerTask.getRotationTimerValueInMinutes());
            rotationTimer.schedule(rotationTimerTask, rotationTimerTask.getRotationTimerValue());
        }
    }

    public void restartTimerForDayBasedRotation() {
        // We will restart the timer only if the timerTask is set which
        // means user has set a value for LogRotation based on Time
        if (rotationTimerTask != null) {
            rotationTimerTask.cancel();
            rotationTimerTask = new LogRotationTimerTask(
                // This is wierd, We need to have a fresh TimerTask object
                // to reschedule the work.
                rotationTimerTask.task,
                60 * 24
            );
            rotationTimer.schedule(rotationTimerTask, 1000 * 60 * 60 * 24);
        }
    }

}
